Spring adjusting device for a door actuating device

Abstract

A door actuating device, including a housing, at least one drive unit which is disposed in the housing and can be coupled to a door leaf, and at least one spring energy accumulator, which is in operative connection with the drive unit, and which includes a spring disposed therein under spring pretension, wherein the spring pretension of the spring is realized by means of a spring adjusting device, which includes at least one screwed sealing plug, which can be connected to the housing, and an adjusting nut, where a cylinder is configured at the screwed sealing plug and oriented towards the spring, at which cylinder the adjusting nut is linearly guided, where a setting element which is guided by means of the screwed sealing plug and, at least in sections, can be brought non-positively and positively into engagement with the cylinder, and which bears against the adjusting nut, serves for adjusting the spring pretension.

The invention claimed is: 
     
       1. A door operating device, comprising a housing, at least one drive unit which is disposed in the housing and can be coupled to a door leaf, and at least one spring energy accumulator, which is in operative connection with the drive unit, and which includes a spring disposed therein under spring pretension, wherein the spring pretension of the spring is realized by means of a spring adjusting device, which comprises at least one screwed sealing plug, which can be connected to the housing, and an adjusting nut, wherein a cylinder is configured at the screwed sealing plug and oriented towards the spring, at which cylinder the adjusting nut is linearly guided, wherein a setting element extends through the screwed sealing plug and, at least in sections, can be brought into a non-positive and positive engagement with the cylinder, and which bears against the adjusting nut, serves to adjust the spring pretension. 
     
     
       2. The door actuating device according to  claim 1 , wherein a female thread, is configured, at least in sections, in the cylinder, which thread can be brought into a positive engagement with a thread, which, at least in sections, is configured at the setting element. 
     
     
       3. The door actuating device according to  claim 1 , wherein the adjusting nut comprises a spring seating, which, at least in sections, bears against the spring. 
     
     
       4. The door actuating device according to  claim 3 , wherein, below the spring seating, the adjusting nut is formed as a tenon, which, at least partially, surrounds the cylinder of the screwed sealing plug and the setting element which is guided by the screwed sealing plug. 
     
     
       5. The door actuating device according to  claim 4 , wherein the tenon of the adjusting nut comprises a bottom against which the setting element comes to bear with one of its ends. 
     
     
       6. The door actuating device according to  claim 4 , wherein the tenon, at least in sections, extends into the spring. 
     
     
       7. The door actuating device according to  claim 1 , wherein the screwed sealing plug is configured as a housing cover for the housing. 
     
     
       8. The door actuating device according to  claim 1 , wherein measuring the push-in depth, in particular the screw-in depth of the setting element into the screwed sealing plug, in particular into the housing cover, serves for verifying the adjusting displacement of the adjusting nut. 
     
     
       9. The door actuating device according to  claim 1 , wherein the setting element is a screw. 
     
     
       10. The door actuating device according to  claim 1 , wherein the spring is a compression spring.